Hey Treehouse,
CMLA /R. Prgesresso is one of my favorite Dx targets here .It shows up ( "at times") fair or better in my apt on Select- A Tenna. Usually weak though.
The competition here on 640 is regional WNNZ, but it's not a problem too often .
Also a few months back I FINALLY heard 640 CBN Newfoundland- a station I've been trying to copy for over 50 years !
I vacation each year on Cuttyhunk Island in Buzzard's Bay , MA . MANY Cubans easily copied there , even in Summer. CMLA bombs in all the time down there. All kind of other long dx as well.
640 is a GREAT frequency to Dx , no matter where you are.
Most of my "serious" Dxing is done below 900 Kc .
FWIW , a new larger home brew bedside loop is around 75% done. 4 gang ceramic var cap, ball drive, etc.
K